Callback Function Logic

Definition ∞ Callback function logic involves a function passed as an argument to another function, intended to be executed after the primary function completes its operation. In smart contracts, this design allows for asynchronous execution and inter-contract communication. It enables a contract to react to events or data from another contract or external system. This mechanism is fundamental for creating complex, interactive decentralized applications.
Context ∞ Within blockchain development, particularly for smart contracts on platforms like Ethereum, understanding callback function logic is critical for preventing reentrancy attacks and other security vulnerabilities. News often covers exploits where flawed callback implementations permitted malicious actors to drain funds from contracts. Developers continually refine security patterns and best practices to ensure safe and predictable execution of these functions.